20777200

素因数分解:

$2^4\times 5^2\times {\mathrm{127}}^1\times {\mathrm{409}}^1$

素因数の和:554

約数の個数: 60

約数和(自身を含む): 50433280

約数和(自身を除く): 29656080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 127, 200, 254, 400, 409, 508, 635, 818, 1016, 1270, 1636, 2032, 2045, 2540, 3175, 3272, 4090, 5080, 6350, 6544, 8180, 10160, 10225, 12700, 16360, 20450, 25400, 32720, 40900, 50800, 51943, 81800, 103886, 163600, 207772, 259715, 415544, 519430, 831088, 1038860, 1298575, 2077720, 2597150, 4155440, 5194300, 10388600, 20777200]

約数ペア:

[(1, 20777200), (2, 10388600), (4, 5194300), (5, 4155440), (8, 2597150), (10, 2077720), (16, 1298575), (20, 1038860), (25, 831088), (40, 519430), (50, 415544), (80, 259715), (100, 207772), (127, 163600), (200, 103886), (254, 81800), (400, 51943), (409, 50800), (508, 40900), (635, 32720), (818, 25400), (1016, 20450), (1270, 16360), (1636, 12700), (2032, 10225), (2045, 10160), (2540, 8180), (3175, 6544), (3272, 6350), (4090, 5080)]